Diff: Widgets/ContainerWidget.h

Revision:

5:b7ce5721a0b5

Child:

7:303850a4b30c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Widgets/ContainerWidget.h	Mon Mar 28 10:47:39 2016 +0000
@@ -0,0 +1,133 @@
+#ifndef SIMPLEGUI_CONTAINER_WIDGET_H
+#define SIMPLEGUI_CONTAINER_WIDGET_H
+
+#include "Widget.h"
+
+class WidgetList
+{
+
+public:
+
+    WidgetList(Widget* w) : widget(w), next(NULL) {}
+
+    Widget* widget;
+    WidgetList* next;
+
+};
+
+/**
+* Simple container hold widgets side-by-side and draws a border
+* It will expand as needed to hold the widgets
+**/
+class ContainerWidget : public Widget
+{
+
+public:
+
+    ContainerWidget(GraphicsDisplay* display) : Widget(display), _padding(0), _widgets(NULL) {
+    }
+
+    /**
+    * Set the amount of padding between the border and a widget edge
+    **/
+    void setPadding(int pixels) {
+        if(_padding != pixels) {
+            _padding = pixels;
+            adjust();
+        }
+    }
+
+    void setBorder(int width, uint16_t colour) {
+        _borderColour = colour;
+        if(_borderWidth != width) {
+            _borderWidth = width;
+            adjust();
+        }
+    }
+
+    void append(Widget* widget) {
+
+        WidgetList* w = new WidgetList(widget);
+
+        if(_widgets == NULL) {
+            _widgets = w;
+        } else {
+            _widgets->next = w;
+        }
+
+        adjust();
+    }
+
+    virtual void setLocation(int x, int y) {
+        Widget::setLocation(x,y);
+        adjust();
+    }
+
+    virtual void setSize(int width, int height) {
+        Widget::setSize(width, height);
+        _minWidth = width;
+        _minHeight = height;
+        adjust();
+    }
+
+    virtual void adjust() {
+        int wx = _x + _padding + _borderWidth;
+        int wy = _y + _padding + _borderWidth;
+        int h = 0;
+        
+        _width = _minWidth;
+        _height = _minHeight;
+
+        WidgetList* p = _widgets;
+        while(p != NULL) {
+            // Position the widget
+            p->widget->setLocation(wx, wy);
+            wx += p->widget->width();
+            if(p->widget->height() > h) {
+                h = p->widget->height();
+            }
+            
+            p = p->next;
+        }
+
+        int neededWidth = _padding + _borderWidth + wx - _x;
+        int neededHeight = 2 * (_padding + _borderWidth) + h;
+        
+        if(neededWidth > _width) {
+            _width = neededWidth;
+        }
+        
+        if(neededHeight > _height) {
+            _height = neededHeight;
+        }
+    }
+    
+    virtual void draw() {
+        // Draw the border
+        // Top
+        _display->fillrect(_x, _y, _x+_width, _y+_borderWidth, _borderColour);
+        // Bottom
+        _display->fillrect(_x, _y + _height - _borderWidth, _x + _width, _y+_height, _borderColour);
+        // Left
+        _display->fillrect(_x, _y, _x+_borderWidth, _y+_height, _borderColour);
+        // Right
+        _display->fillrect(_x+_width-_borderWidth, _y, _x+_width, _y+_height, _borderColour);
+        
+        WidgetList* p = _widgets;
+        while(p != NULL) {
+            p->widget->draw();
+            p = p->next;
+        }
+    }
+
+
+protected:
+
+    int _padding;
+    WidgetList* _widgets;
+    int _minWidth, _minHeight;
+    int _borderWidth;
+    uint16_t _borderColour;
+};
+
+#endif
\ No newline at end of file